Heads up that the article is exclusively about the Windows platform.
It sucks so bad that you need to Google tutorials and fiddle with command line settings, depending on your GPU and drivers (do you use VA-API, VDPAU, or NVDEC?) , just to get HW decode in browser working (if you even manage to), when this works out of the box even on $99 Chinese Android phones, which ironically, have Linux underneath.
Madness.